学习QT|QT的http封装类 http|c++|qt

头文件如下

#pragma once#ifndef _HTTP_H_ #define _HTTP_H_#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include typedef struct _HTPPError { int dataerrorcode; int fileerrorcode; }HTPPError; class Http : public QObject { Q_OBJECT public: Q_INVOKABLE void SendData(const QString& url, QJsonObject jsonObj); //Q_INVOKABLE void SendFile(const QString& url, QFile *file, QString FileName); Q_INVOKABLE void SendFile(const QString& url, const QString strFilePath); HTPPError GetHTPPError() { return Error; } public: const QString urldata = "http://192.168.1.110:82/prod-api/dafen/cableAuto/upload/dafen-data"; const QString urlpic = "http://192.168.1.110:82/prod-api/dafen/cableAuto/upload/cable-picture?cableId=1&desc="; const QString urlpdf = "http://192.168.1.110:82/prod-api/dafen/cablePdf/upload/cable-pdf?cableId=1"; private: HTPPError Error; }; #endif

【学习QT|QT的http封装类】源文件如下：

#include "http.h" #include #include void Http::SendData(const QString& url, QJsonObject jsonObj) { QJsonDocument document; document.setObject(jsonObj); QByteArray content = document.toJson(QJsonDocument::Compact); QNetworkRequest request; request.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/json")); request.setUrl(url); QNetworkAccessManager *manager = new QNetworkAccessManager(); QNetworkReply* reply = manager->post(request, content); QEventLoop _loop; QTimer timer; connect(reply, SIGNAL(finished()), &_loop, SLOT(quit())); connect(&timer, SIGNAL(timeout()), &_loop, SLOT(quit())); // eventloop用于阻塞等待消息，并结合timer进行超时处理 timer.start(1000); _loop.exec(); // 这里的eventloop只是阻塞此段，并不会阻塞其他块的代码，比如我不加定时器，让这个eventloop一直exec，还是可以出发相关的槽函数 int status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt(); Error.dataerrorcode = status_code; if (timer.isActive()) { timer.stop(); } _loop.deleteLater(); timer.deleteLater(); // 释放资源 reply->abort(); }

void Http::SendFile(const QString& url,const QString strFilePath) { QEventLoop loop; QFile *file = new QFile(strFilePath); file->open(QIODevice::ReadOnly); QHttpMultiPart*multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType); QHttpPart filePart; QFileInfo upload_file_info(strFilePath); filePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream")); //这里一般这样写 filePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file\"; filename=\"" + upload_file_info.fileName() + "\"")); filePart.setBodyDevice(file); file->setParent(multiPart); //delte file with the multiPart multiPart->append(filePart); QNetworkAccessManager* pNetManager = new QNetworkAccessManager; QUrl _url(url); QNetworkRequest request(_url); QNetworkReply* reply = pNetManager->post(request, multiPart); multiPart->setParent(reply); //delte multiPart with the reply QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit); loop.exec(); pNetManager->deleteLater(); }

调用方法如下：
先定义一个QJsonObject，然后插入QString（项目代码里面粘贴复制的）；

QJsonObject jsonObj; jsonObj.insert("cableId", QString::number(cabelid)); jsonObj.insert("1", result.conductor_size); jsonObj.insert("2", result.core_pencil_head_size); jsonObj.insert("3", result.outside_pencil_head_size); jsonObj.insert("4", result.inner_semiconducting_size); jsonObj.insert("5", result.main_insulation_deviation); jsonObj.insert("6", result.core_outside_semiconducting_end); jsonObj.insert("7", result.core_top_2_outside_pencil_head_distance); jsonObj.insert("8", result.conductor_deformation); jsonObj.insert("9", result.core_top_uneven); jsonObj.insert("10", result.conductor_section_inclination); jsonObj.insert("11", result.outside_semiconducting_size); jsonObj.insert("12", result.outer_diameter_difference_200_265); jsonObj.insert("13", result.insulation_core_size_18); jsonObj.insert("14", result.max_con1); jsonObj.insert("15", result.max_con2); jsonObj.insert("16", result.max_con3);

void Collection::Send() { http->SendData(http->urldata, getJson()); //传输数据 QMessageBox::about(this, tr("Error"), "http数据编码为:"+QString::number(http->GetHTPPError().dataerrorcode)); SendPic(GetVTKQPixmap(ui.qvtkWidget2)); SendPic(GetVTKQPixmap(ui.qvtkWidget3)); SendPic(GetVTKQPixmap(ui.qvtkWidget4)); SendPic(GetVTKQPixmap(ui.qvtkWidget5)); }